A Database Management System (DBMS) is a software system used to manage and interact with databases. It provides a structured way of storing, retrieving, and manipulating data efficiently. Understanding DBMS is essential for students preparing for competitive exams, placements, and other technical assessments. This article explores key aspects of DBMS MCQs, including types of questions, concepts, and areas of application, providing a valuable resource for exam preparation.
Here are the database management system multiple choice questions:
a) Database Management Software
b) Database Modeling System
c) Database Management System
d) Database Model Software
Answer: c) Database Management System
a) Relational
b) Network
c) Hierarchical
d) All of the above
Answer: d) All of the above
a) Query Processor
b) Database Engine
c) Database Table
d) Indexing Engine
Answer: c) Database Table
a) Table
b) Views
c) Query
d) All of the above
Answer: d) All of the above
a) Relational Model
b) Network Model
c) Hierarchical Model
d) Object - Oriented Model
Answer: Hierarchical Model
a) SELECT
b) INSERT
c) UPDATE
d) DELETE
Answer: a) SELECT
a) Avoiding redundancy
b) Increasing performance
c) Reducing query time
d) All of the above
Answer: a) Avoiding redundancy
a) Uniquely identify a record in a table
b) Enforce relationships between tables
c) Prevent data duplication
d) All of the above
Answer: d) All of the above
a) One-to-One
b) One-to-Many
c) Many-to-Many
d) Many-to-One
Answer: d) Many-to-One
a) DELETE
b) DROP
c) REMOVE
d) TRUNCATE
Answer: b) DROP
a) Concurrency Control
b) Transaction Control
c) Data Integrity
d) Backup Management
Answer: b) Transaction Control
a) Primary Key
b) Foreign Key
c) Check
d) All of the above
Answer: d) All of the above
a) Structured Query Language
b) Simple Query Language
c) Sequential Query Language
d) None of the above
Answer: a) Structured Query Language
b) Data Integrity
c) Less Security
d) Data Anomalies
Answer: b) Data Integrity
a) A key used to identify a column uniquely in a table
b) A key used to connect two tables
c) A key that does not allow NULL values
d) A key used to store passwords
Answer: b) A key used to link two tables
a) Data is organized into tables
b) Relationships are represented using pointers
c) Data is stored as objects
d) None of the above
Answer: d) Data is organized into tables
a) Speed up data retrieval
b) Ensure data integrity
c) Prevent data redundancy
d) All of the above
Answer: a) Speed up data retrieval
a) Relational Database
b) Object-Oriented Database
c) NoSQL Database
d) Network Database
Answer: c) NoSQL Database
a) WHERE
b) ORDER BY
c) HAVING
d) GROUP BY
Answer: a) WHERE
a) DDL (Data Definition Language)
b) DML (Data Manipulation Language)
c) TCL (Transaction Control Language)
d) DCL (Data Control Language)
Answer: a) DDL (Data Definition Language)
a) A tool to store user data
b) A collection of all the data in a database
c) A repository that stores metadata about the database
d) A special database table
Answer: c) A repository that stores metadata about the database
a) It combines rows from two or more tables based on a relationship column
b) It only works on one table
c) It is used to delete data from multiple tables
d) It cannot be used for relational tables
Answer: a) It combines rows from two or more tables based on a relationship column
a) Atomicity, Consistency, Isolation, Durability
b) Atomicity, Concurrency, Integrity, Durability
c) Accuracy, Consistency, Isolation, Durability
d) None of the above
Answer: a) Atomicity, Consistency, Isolation, Durability
a) To sort records
b) To filter records
c) To group records based on one or more columns
d) To combine records from multiple tables
Answer: c) To group records based on one or more columns
a) SELECT
b) CREATE
c) DROP
d) ALTER
Answer: a) SELECT
a) Data integrity by ensuring consistency between linked tables
b) Uniqueness of rows in a table
c) Data is entered in the correct format
d) None of the above
Answer: a) Data integrity by ensuring consistency between linked tables
a) Inner Join
b) Left Join
c) Right Join
d) Full Outer Join
Answer: d) Full Outer Join
a) Centralized control
b) Increased data security
c) High cost of DBMS software
d) Data redundancy
Answer: c) High cost of DBMS software
a) COUNT()
b) AVG()
c) SUM()
d) MIN()
Answer: c) SUM()
a) 1NF
b) 2NF
c) 3NF
d) BCNF
Answer: c) 3NF
a) COUNT
b) SUM
c) AVG
d) All of the above
Answer: d) All of the above
a) A stored procedure that runs when a specific event occurs
b) A method to generate unique keys
c) A constraint used to maintain data integrity
d) A method to define relationships between tables
Answer: a) A stored procedure that runs when a specific event occurs
a) Fixed schema
b) Horizontal scaling
c) Data is organized in tables
d) All of the above
Answer: b) Horizontal scaling
a) ORDER BY
b) HAVING
c) WHERE
d) GROUP BY
Answer: a) ORDER BY
a) Relational
b) Network
c) Hierarchical
d) Object-Oriented
Answer: a) Relational
a) COMMIT
b) ROLLBACK
c) SAVEPOINT
d) All of the above
Answer: d) All of the above
a) PRIMARY KEY
b) UNIQUE
c) FOREIGN KEY
d) DISPLAY
Answer: d) DISPLAY
a) Hierarchical model
b) Relational model
c) Object-Oriented model
d) Network model
Answer: b) Relational model
a) CONCAT()
b) LENGTH()
c) UPPER()
d) All of the above
Answer: d) All of the above
a) MODIFY
b) CHANGE
c) UPDATE
d) INSERT
Answer: c) UPDATE
a) Oracle
b) MySQL
c) MongoDB
d) PostgreSQL
Answer: c) MongoDB
a) One record in the first table is linked to one record in the second table
b) One record in the first table is linked to many records in the second table
c) Many records in the first table are linked to many records in the second table
d) None of the above
Answer: b) One record in the first table is linked to many records in the second table
a) Increase redundancy
b) Simplify queries
c) Eliminate data redundancy and dependency
d) Speed up transactions
Answer: c) Eliminate data redundancy and dependency
a) To filter records before grouping
b) To filter records after grouping
c) To perform calculations on columns
d) None of the above
Answer: b) To filter records after grouping
a) Candidate key
b) Foreign key
c) Composite key
d) Super key
Answer: b) Foreign key
a) Data is stored in tables
b) Data is stored as objects
c) Data is stored in a tree structure
d) None of the above
Answer: a) Data is stored in tables
a) To store and manage data
b) To organize data in files
c) To perform calculations on data
d) To maintain relationships between tables
Answer: a) To store and manage data
a) DISTINCT
b) UNIQUE
c) NO_DUPLICATE
d) NONE
Answer: a) DISTINCT
a) Enhanced security
b) High redundancy
c) Poor data integrity
d) Complexity in design
Answer: a) Enhanced security
a) CREATE TABLE table_name (column1 datatype, column2 datatype, ...);
b) CREATE table_name (column1 datatype, column2 datatype, ...);
c) TABLE CREATE table_name (column1 datatype, column2 datatype, ...);
d) None of the above
Answer: a) CREATE TABLE table_name (column1 datatype, column2 datatype, ...);
In conclusion, these database management system MCQs are crucial to clear competitive exams, placement tests, or interviews for data analyst careers. Regular practice with database management systems MCQs will help you grasp essential concepts such as database normalization, SQL queries, and transaction management. These questions can serve as a solid resource for boosting your DBMS knowledge.
A Database Management System (DBMS) is a system software that provides an interface to users to interact with databases, ensuring data organization, access control, and management.
